Stable oxygen and carbon isotope ratios of Globigerinoides sacculifer of ODP Hole 134-828A from the Southwest Pacific (Table 2) ...

• Main Authors: Martínez, José Ignacio, De Deckker, Patrick, Chivas, Allan R
• Format: Dataset
• Language: English
• Published: PANGAEA 1997
• Subjects: DEPTH, sediment/rock; Sample code/label; Globigerinoides sacculifer, δ18O; Globigerinoides sacculifer, δ13C; Drilling/drill rig; DSDP/ODP/IODP sample designation; Mass spectrometer Finnigan MAT 251; Leg134; Joides Resolution; Ocean Drilling Program ODP; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.690363; https://doi.pangaea.de/10.1594/PANGAEA.690363

Oxygen-isotope analyses of planktonic foraminifera from 57 western Pacific deep-sea cores are compared for the Holocene and the Last Glacial Maximum (LGM). Carbonate dissolution, sedimentation rates/bioturbation, sample density, and vital effects are assessed before the sea-surface salinity signal of these records is reconstructed. Average glacial-interglacial Delta delta18O values in the western Pacific are found to be close to those in the Atlantic Ocean (1.76 ‰ in the Pacific compared to 1.80 ‰ in the Atlantic), questioning previous suggestions of a larger salinity difference between the Atlantic and the Pacific oceans during the LGM. During the LGM, sea-surface salinity was higher in the western Pacific than today (by >~1 ‰), implying that evaporation minus precipitation was higher all over the region. The minimum change in sea-surface salinity occurred around the equator at the core of the Western Pacific Warm Pool. Holocene high-amplitude, high-frequency fluctuations in planktonic delta18O records ... : Supplement to: Martínez, José Ignacio; De Deckker, Patrick; Chivas, Allan R (1997): New estimates for salinity changes in the Western Pacific Warm Pool during the Last Glacial Maximum: oxygen-isotope evidence. Marine Micropaleontology, 32(3-4), 311-340 ...